Spinning machine



May 31, 1932. M. WILD SPINNING MACHINE Filed July 4. 1930 Patented May 31', 1932 UNITED STATES MELGI-IIOR WILD, F LOMAZ Z(),'ITALY SPINNING MACHINE Application filed July 4,

The present invention relates to a new and improved stop motion for spinning machines especially for ring spinningframes, for for-' the preferred embodiment of my invention a detector lever, hinged to an adjustable slide is made to rest on the thread to be controlled,

the tension of the thread holding the lever up. When the thread breaks the lever falls and suitably formed tongues on said lever come in contact with the delivery shaft. which by friction or otherwise inserts the tongue under the top roller and sets the same at rest etc.

' The detector lever shows by its position the tension under which the thread runs in the frame.

In the accompanying drawings the preferred embodiment of my invention is shown by way of an example:

Fig. 1 is a side view of the device, parts being shown in section; the device being shown .in connection. with a spinning machine;

Fig. '2 is a frontal view thereof.

The device shown comprises an arm 1 pivotally mounted on a slide 10 by means of a pin 2. The slide 10 is provided with a vertical slot 11 and is adjustably held on a bracket 8 by means of a; screw 12. In the bracket 8 the upper roller a is rotatably mounted in such a manner that it can be freely lifted in vertical direction. The roller a bears on the lower roller 5 of the frame which roller 6 runs in fixed bearings and is arranged within a water tray 9. The frame and all parts thereof may be of any of the well known constructions. The free end part 5 of arm 1 is slightly turned upwards and is provided with two extensions 3 projecting on both sides of said arm 1. On each extension 3 a tongue ing not shown in the drawings.

1930. Serial No. 465,795.

at is removably fixed. The said tongues 4 projectagainst the rollers a, b. The dimensions of the parts 1, 3, 1 and the adj ustment of the slide 10 on the bracket 8 are such that the tongues 1 may pass between the parts a, Z) if the arm 1 swings on its pivot 2 (see broken lines Fig. 1). The front edges of the tongues 4 are bevelled. The tongues t'may be made of leather, vulcanized fibre, or any suitable flex ible material. The shaft b on which the tongues 4 may fall takes them by friction and inserts the same under the top'rollers a. In use the arm 1 rests on athread F running from a bobbin (Z over the lower roller Z) and the upper roller to a guide roller 0 and from thence to the doubling or twisting device. In the frame a shaft 18 is rigidly mounted. The shaft, 18 runs parallel tothe rollers aand b and on said shaft 18 arms 6 are rotatably mounted one for each arm 1. Each arm 6 projects with its end portion in the path of the end 5 of arm 1. The arm 1 resting on the thread F may bevlifted therefrom by lifting arm 6 into the position shown by broken lines Fig. 1. The stop motion works as follows:

The arm 1 rests on the portion of the thread F between roller a and the thread guide 6. The pressure exerted by the weight of arm 1 on the thread depends on the angle at which the thread F runs. Upon breakage of a thread F or if its tension is reduced; the arm 1 falls down under its own weight and the tongues tpass between the rollers a, b. The upper roller a is'lifted from the roller 6 which is positively driven by suitable gear- As soon as roller (1 is out of contact with roller 1) it ceases to turn and the thread F comes to rest. I

When the machine is at rest and during the starting and stopping of the frame while the tension of the thread F is below normal the arms 1 are held out of contact with the threads F by means of the arms 6, which are swung upwardly and held fast in their upper position by friction or by any other well known auxiliary device.

If the spindles of the frame run at different speeds the threads F become more or less slack and the arms 1 resting on the threads assume different positions according to the tension of the respective threads. The operator can readily see by the position of the arms 1 whether the threads run under proper tension. The operator is thereby in a position to control the speed of the twisting or doubling device etc. and may adjust the speed of the spindles, etc. by adjusting the tension of the driving cord of the spindle, by controlling the lubrication etc.

By adjusting the position of. pivot. 2 more or less of the weightof arm 1 may be brought to bear on the thread F.

I claim:

1. In a stop motion for spinning machines,

in combination with a lower roller having fixed bearings, an upper roller havin vertically movable bearings and when oweredarranged to bear on the lower roller and a guide roller, a pivotally mounted guard arm arranged to bear on a thread at a point between the upper roller and the guide roller, and means to lift said guard arm, said guard arm having a pair of tongues between which the thread passes, said tongues being arrarwed, in the event of the breaking or slac l rening of the thread, to enter between thelower and upper rollers and thereby stop rotation of the upper roller and without removal of the thread from the upper roller,

said guard arm being further provided at its free end with a projection forengagement by the lifting means.

2. Stop motion as claimed in claim 1, in

which the arm is mounted not only for 'pivotal movement, but also for vertical adjus'tment.

In testimony whereof I afiix m signature.

MELCHIO WILD. 

